We have recently purchased a game from another company and have done some updates to it with all the information converted over to our side.
The game is made and updated using Unity and is for the Android platform.
After doing all of these updates in Unity and using the Keystore that they supplied us (along with the passwords for the Keystore and the Key), we built the APK with no errors.
When I go into the Google Developer account and try to upload the new APK for testing, I get an error at the end of the upload that tells me that the certificate used in the APK is different than the one originally used on the other APKs so it can not upload the APK.
I have searched everywhere and people are saying that it is the Keystore and the key but I have the correct Keystore and Key because Unity would not allow me to build outside of debug testing without it (I tested this by putting a wrong password in for the Key and Unity gave me errors saying I had the wrong password).
I am using - Macbook Pro with OSX 10.8.3 - Unity Version 4.1.3
I have all the correct SDKs for Android and the manifest package name matches the Bundle Identifier for the project. (The Bundle Identifier also matches the correct one attached to the Google Dev site.
Please help.